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Reply to Rosetta bug
You haven’t asked a question here, so it’s not clear what your goal is with this forums thread. My best guess is that you’re aiming to report a bug in Rosetta. If that’s the case I recommend that you file that in Feedback Assistant. See Bug Reporting: How and Why? for lots of detailed advice on that topic. Please post your bug number, just for the record. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
2d
Reply to IPhone fails to connect with Xcode in presence of multiple WebContentFilters
I want to start by pointing you at TN3158 Resolving Xcode 15 device connection issues. This provides general background and one critical data point, namely, it shows how to identify the direct link interfaces used by Xcode. [quote='821229021, tathac, /thread/821229, /profile/tathac'] I have my web content filter … and there is also SentinelOne web content filter with same configuration. [/quote] I’m presuming that this SentinelOne filter isn’t something you have direct control over. Given that, my advice is that you remove it from the equation and replace it with a placeholder content filter that you do control. This gives you full control over the (non-Apple) bits of the stack. That’ll tell you whether this issue is fundamental to having two content filters installed, or whether there’s something specific about the SentinelOne filter that’s triggering the issue. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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Reply to Inquiry Regarding USB Network Connectivity Between an iPad (Wi‑Fi Model) and an Embedded Linux Device
My understanding is that your accessory is presenting a network interface to iOS much like, say, an USB Ethernet dongle would. In that case I’d expect iOS to assign IP addresses to that interface as long as the interface claims that it’s up. You can prototype this with an USB Ethernet dongle: Connect the dongle via Ethernet to the Internet. And then connect it to iOS. Verify that iOS has network connectivity over the Ethernet. Disconnect it from iOS. Disconnect the Ethernet dongle from the Internet, but leave it connected to your switch so that the link status stays up. Reconnect it to iOS. You should see iOS bring up the interface with link-local IPv4 [1] and IPv6 addresses. Any app running on iOS should be able to communicate over that interface. For example, if you have a configure like this: iPhone | USB Ethernet | ----+----------------+--------------- isolated Ethernet | Mac | ---------------------+--------------- Wi-Fi to Internet Safari on the iPhone should be able to connect to a web server running on
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Reply to iPhone 16 Datasheet
It’s hard to offer a specific answer without more context. iOS uses many different cryptographic algorithms, and the exact details vary based on the circumstances. Have you read Apple Platform Security? If not, I suggest you start there. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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Reply to DMG notarization stuck In Progress 8+ hours — 12 submissions, all showing in-progress, not able to found any log related to any submission id.
You can expect that most uploads will be notarised quickly. Occasionally, some uploads are held for in-depth analysis and may take longer to complete. As you notarise your apps, the system will learn how to recognise them, and you should see fewer delays. For lots of additional info about notarisation, see Notarisation Resources. Specifically, it links to a Q&A with the notary service team that’s quite instructive. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: Code Signing SubTopic: Notarization Tags:
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Reply to TEAM ID Prefix Keychain Access
Thanks for bringing this to the forums. [quote='821062021, hsbc-uruguay, /thread/821062, /profile/hsbc-uruguay'] Any improvements or new tools available since the 2022 DTS post? [/quote] I’m glad you asked (-: Recently the App Store Connect folks updated their documentation to describe a technique for transferring app groups between teams. See App Store Connect Help > Transfer an app > Overview of app transfer > Apps using App Groups [1]. Given that, it’s now possible to use an existing technique — using an app group ID as a keychain access group — to preserve keychain access across an app transfer. I’ve just updated App ID Prefix Change and Keychain Access to describe this approach. Now, this is all very ‘bleeding edge’, and thus it’s possible that you might run into snags. However, it’s certainly an option worth exploring. [quote='821062021, hsbc-uruguay, /thread/821062, /profile/hsbc-uruguay'] We just finished an app transfer to our developer account. [/quote] The option I’m describing typically r
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Reply to XPC communication between a sandboxed Network Extension and a privileged MachService
[quote='882269022, Pavel, /thread/820631?answerId=882269022#882269022, /profile/Pavel'] is there a guaranteed initialization order between them? [/quote] No, but that doesn’t matter because the launchd on-demand architecture defines away the sorts of ordering problems that plague other systems. If your NE sysex messages your launchd daemon, the system will start the daemon so that it can service the request. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
3d
Reply to Can NWConnection.receive(minimumIncompleteLength:maximumLength:) return nil data for UDP while connection remains .ready?
[quote='882249022, vishalsehgal, /thread/815465?answerId=882249022#882249022, /profile/vishalsehgal'] In case error remains nil, can I still receive Data as null? [/quote] Yes. That indicates an EOF. As I mentioned earlier, the doc comments are the best source of truth for this stuff. Quoting the doc comment for nw_connection_receive_completion_t from : The content may be NULL in two cases: The receive context (logical message) is now complete, and the callback is only delivering the completed event The connection encountered an error and there is no data to deliver. Note that the content may be non-NULL even in the case of an error if there was some data received before the error was encountered. The caller should process all content it receives, and not necessarily ignore data in case of errors. I don’t think this can happen with UDP because UDP doesn’t support the concept of EOF. [quote='882249022, vishalsehgal, /thread/815465?answerId=882249022#882249022, /profile/vishalsehgal'] Is there any performance/e
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Reply to Xcode 26.4 is missing the documentation for Foundation
FB22362166 Thanks! AFAICT this is Just A Bug™. I’m seeing a similar issue with my Xcode 26.4 install (a public release of Xcode 26.4 running on a public release of macOS 26.3.1). I suspect it’s due to the recent work to synchronise documentation between Apple > Developer and Swift > Documentation. However, we won’t know for sure until your bug has had more chance to find its way through our systems. ps It’s better to reply as a reply, rather than in the comments; see Quinn’s Top Ten DevForums Tips for this and other titbits. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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Reply to Interoperability and traffic flow when multiple Transparent Proxy providers coexist
[quote='882281022, Pavel, /thread/820632?answerId=882281022#882281022, /profile/Pavel'] [outside of MDM] is there any programmatic way to influence which proxy receives the flow first? [/quote] No. And, in practice, the order you get is very much an implementation detail, one that changes from Mac to Mac and OS release to OS release. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
3d
Reply to TKTokenDriverConfiguration becomes permanently unusable after ctkd process restart
[quote='882312022, dopey, /thread/820940?answerId=882312022#882312022, /profile/dopey'] We are actually seeing seeing this happen in practice. [/quote] OK. [quote='882312022, dopey, /thread/820940?answerId=882312022#882312022, /profile/dopey'] it's not deterministic. [/quote] Right. It’s hard to say what’s going on without more logging, but the most likely cause is a memory pressure exit, and that’s very non-deterministic. [quote='882312022, dopey, /thread/820940?answerId=882312022#882312022, /profile/dopey'] I will open a bug and post the bug number. [/quote] Much appreciated. Ideally this would include a sysdiagnose log taken: On a device with extra CryptoTokenKit logging enabled (see below) Shortly after seeing the problem But that might be hard to get, so you should feel free to file a bug with only your ‘kill ctkd’ step as evidence. On the logging front, our Bug Reporting > Profiles and Logs only has a CryptoTokenKit profile for iOS. However, you can install that profile on macOS, and I think it’ll ju
Topic: Privacy & Security SubTopic: General Tags:
3d
Reply to Localization in Swift macOS console Apps.
[quote='882371022, Arebus, /thread/820871?answerId=882371022#882371022, /profile/Arebus'] I thought it would be easier to write a CLI than … [/quote] Yeah, I know what you mean, but recently I’ve moved away from that approach: For low-level stuff, I tend to put the test code into a unit test. This is just as easy to debug as a command-line tool, but it has the advantage that, as you exercise various code paths, you build up a corpus of unit tests that ensure that things continue to work in the future. For GUI stuff, I lean into Xcode’s preview feature. Or just do my experimentation in an target. And there’s Xcode’s UI testing support. I don’t use that a lot but, in my defence, UI stuff isn’t my focus. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: UI Frameworks SubTopic: SwiftUI Tags:
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Reply to test NEAppProxyProvider without MDM?
[quote='882274022, Davidbaraff2, /thread/820572?answerId=882274022#882274022, /profile/Davidbaraff2'] Do you know of any off the shelf VPNs that can be configured in the way you describe? [/quote] No. But my expertise is in VPN APIs, not VPN products. [quote='882274022, Davidbaraff2, /thread/820572?answerId=882274022#882274022, /profile/Davidbaraff2'] If you could point me [at code to] open sockets that will only use cellular [/quote] To start you off: Extra-ordinary Networking > Network Interface Techniques > Binding to an Interface explains how to bind a socket to a specific interface. Extra-ordinary Networking > Network Interface APIs > Network Interface Type explains how to identify the WWAN interface. [quote='882274022, Davidbaraff2, /thread/820572?answerId=882274022#882274022, /profile/Davidbaraff2'] We have total control of our local network. [/quote] So what happens if you don’t deploy a DHCP server on that network? I would expect that you’ll still be able to communicate with your iPads us
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Reply to Are there known issues with aggressive optimization (-O) affecting third-party libraries?
[quote='821109021, JTechHyd, /thread/821109, /profile/JTechHyd'] Are there known issues with aggressive optimization (-O) affecting … ? [/quote] Yes. If you’re using a C-based language it’s very easy to rely on undefined behavior, and the exact behaviour you get can change based on the optimisation level, the compiler version, the OS version, and so on. This is true in safer languages as well, but it’s less common. For example, Swift is generally safer than C but there are still sources of undefined behaviour, including unsafe pointers [1] and concurrency [2]. Is sounds like you’re building this third-party library from source. Is that right? If so, you can dig into the library to see if you can isolate the cause of the problem. This is no different from tackling a hard-to-debug problems in your own code. You can use both build-time tools (like the Clang static analyser) and runtime tools (like the standard memory debugging tools). It’s also possible for problems like this to be caused by bugs in the compiler
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Reply to How to debug a Launch Daemon that requires an App Group provisioning profile for XPC communication
[quote='821027021, Pavel, /thread/821027, /profile/Pavel'] For debugging purposes, I am trying to run the daemon's executable directly from the terminal [/quote] This won’t work. For your launchd daemon to work correctly, it must be started by launchd. I explain why that’s the case in XPC and App-to-App Communication. My general advice for debugging a launchd daemon is: Structure your code so that you can do most of your debugging in unit tests, rather than in your daemon. That’ll make your life much easier. To unit test your XPC code, use the technique in TN3113 Testing and debugging XPC code with an anonymous listener. To debug integration issues: Using LLDB’s --wait-for option to attach to the daemon shortly after it starts. There’s a similar option in Xcode, under Debug > Attach to Process by PID or Name. Or if you absolutely need to debug from the first instruction, add the WaitForDebugger property to your launchd property list. See the launchd.plist man page for details. [quote='821027021, Pavel, /th
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Reply to Rosetta bug
You haven’t asked a question here, so it’s not clear what your goal is with this forums thread. My best guess is that you’re aiming to report a bug in Rosetta. If that’s the case I recommend that you file that in Feedback Assistant. See Bug Reporting: How and Why? for lots of detailed advice on that topic. Please post your bug number, just for the record. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
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Reply to IPhone fails to connect with Xcode in presence of multiple WebContentFilters
I want to start by pointing you at TN3158 Resolving Xcode 15 device connection issues. This provides general background and one critical data point, namely, it shows how to identify the direct link interfaces used by Xcode. [quote='821229021, tathac, /thread/821229, /profile/tathac'] I have my web content filter … and there is also SentinelOne web content filter with same configuration. [/quote] I’m presuming that this SentinelOne filter isn’t something you have direct control over. Given that, my advice is that you remove it from the equation and replace it with a placeholder content filter that you do control. This gives you full control over the (non-Apple) bits of the stack. That’ll tell you whether this issue is fundamental to having two content filters installed, or whether there’s something specific about the SentinelOne filter that’s triggering the issue. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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2d
Reply to Inquiry Regarding USB Network Connectivity Between an iPad (Wi‑Fi Model) and an Embedded Linux Device
My understanding is that your accessory is presenting a network interface to iOS much like, say, an USB Ethernet dongle would. In that case I’d expect iOS to assign IP addresses to that interface as long as the interface claims that it’s up. You can prototype this with an USB Ethernet dongle: Connect the dongle via Ethernet to the Internet. And then connect it to iOS. Verify that iOS has network connectivity over the Ethernet. Disconnect it from iOS. Disconnect the Ethernet dongle from the Internet, but leave it connected to your switch so that the link status stays up. Reconnect it to iOS. You should see iOS bring up the interface with link-local IPv4 [1] and IPv6 addresses. Any app running on iOS should be able to communicate over that interface. For example, if you have a configure like this: iPhone | USB Ethernet | ----+----------------+--------------- isolated Ethernet | Mac | ---------------------+--------------- Wi-Fi to Internet Safari on the iPhone should be able to connect to a web server running on
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2d
Reply to iPhone 16 Datasheet
It’s hard to offer a specific answer without more context. iOS uses many different cryptographic algorithms, and the exact details vary based on the circumstances. Have you read Apple Platform Security? If not, I suggest you start there. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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2d
Reply to DMG notarization stuck In Progress 8+ hours — 12 submissions, all showing in-progress, not able to found any log related to any submission id.
You can expect that most uploads will be notarised quickly. Occasionally, some uploads are held for in-depth analysis and may take longer to complete. As you notarise your apps, the system will learn how to recognise them, and you should see fewer delays. For lots of additional info about notarisation, see Notarisation Resources. Specifically, it links to a Q&A with the notary service team that’s quite instructive. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: Code Signing SubTopic: Notarization Tags:
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2d
Reply to TEAM ID Prefix Keychain Access
Thanks for bringing this to the forums. [quote='821062021, hsbc-uruguay, /thread/821062, /profile/hsbc-uruguay'] Any improvements or new tools available since the 2022 DTS post? [/quote] I’m glad you asked (-: Recently the App Store Connect folks updated their documentation to describe a technique for transferring app groups between teams. See App Store Connect Help > Transfer an app > Overview of app transfer > Apps using App Groups [1]. Given that, it’s now possible to use an existing technique — using an app group ID as a keychain access group — to preserve keychain access across an app transfer. I’ve just updated App ID Prefix Change and Keychain Access to describe this approach. Now, this is all very ‘bleeding edge’, and thus it’s possible that you might run into snags. However, it’s certainly an option worth exploring. [quote='821062021, hsbc-uruguay, /thread/821062, /profile/hsbc-uruguay'] We just finished an app transfer to our developer account. [/quote] The option I’m describing typically r
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3d
Reply to XPC communication between a sandboxed Network Extension and a privileged MachService
[quote='882269022, Pavel, /thread/820631?answerId=882269022#882269022, /profile/Pavel'] is there a guaranteed initialization order between them? [/quote] No, but that doesn’t matter because the launchd on-demand architecture defines away the sorts of ordering problems that plague other systems. If your NE sysex messages your launchd daemon, the system will start the daemon so that it can service the request. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
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3d
Reply to Can NWConnection.receive(minimumIncompleteLength:maximumLength:) return nil data for UDP while connection remains .ready?
[quote='882249022, vishalsehgal, /thread/815465?answerId=882249022#882249022, /profile/vishalsehgal'] In case error remains nil, can I still receive Data as null? [/quote] Yes. That indicates an EOF. As I mentioned earlier, the doc comments are the best source of truth for this stuff. Quoting the doc comment for nw_connection_receive_completion_t from : The content may be NULL in two cases: The receive context (logical message) is now complete, and the callback is only delivering the completed event The connection encountered an error and there is no data to deliver. Note that the content may be non-NULL even in the case of an error if there was some data received before the error was encountered. The caller should process all content it receives, and not necessarily ignore data in case of errors. I don’t think this can happen with UDP because UDP doesn’t support the concept of EOF. [quote='882249022, vishalsehgal, /thread/815465?answerId=882249022#882249022, /profile/vishalsehgal'] Is there any performance/e
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Reply to Xcode 26.4 is missing the documentation for Foundation
FB22362166 Thanks! AFAICT this is Just A Bug™. I’m seeing a similar issue with my Xcode 26.4 install (a public release of Xcode 26.4 running on a public release of macOS 26.3.1). I suspect it’s due to the recent work to synchronise documentation between Apple > Developer and Swift > Documentation. However, we won’t know for sure until your bug has had more chance to find its way through our systems. ps It’s better to reply as a reply, rather than in the comments; see Quinn’s Top Ten DevForums Tips for this and other titbits. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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Reply to Interoperability and traffic flow when multiple Transparent Proxy providers coexist
[quote='882281022, Pavel, /thread/820632?answerId=882281022#882281022, /profile/Pavel'] [outside of MDM] is there any programmatic way to influence which proxy receives the flow first? [/quote] No. And, in practice, the order you get is very much an implementation detail, one that changes from Mac to Mac and OS release to OS release. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: App & System Services SubTopic: Core OS Tags:
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3d
Reply to TKTokenDriverConfiguration becomes permanently unusable after ctkd process restart
[quote='882312022, dopey, /thread/820940?answerId=882312022#882312022, /profile/dopey'] We are actually seeing seeing this happen in practice. [/quote] OK. [quote='882312022, dopey, /thread/820940?answerId=882312022#882312022, /profile/dopey'] it's not deterministic. [/quote] Right. It’s hard to say what’s going on without more logging, but the most likely cause is a memory pressure exit, and that’s very non-deterministic. [quote='882312022, dopey, /thread/820940?answerId=882312022#882312022, /profile/dopey'] I will open a bug and post the bug number. [/quote] Much appreciated. Ideally this would include a sysdiagnose log taken: On a device with extra CryptoTokenKit logging enabled (see below) Shortly after seeing the problem But that might be hard to get, so you should feel free to file a bug with only your ‘kill ctkd’ step as evidence. On the logging front, our Bug Reporting > Profiles and Logs only has a CryptoTokenKit profile for iOS. However, you can install that profile on macOS, and I think it’ll ju
Topic: Privacy & Security SubTopic: General Tags:
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3d
Reply to Localization in Swift macOS console Apps.
[quote='882371022, Arebus, /thread/820871?answerId=882371022#882371022, /profile/Arebus'] I thought it would be easier to write a CLI than … [/quote] Yeah, I know what you mean, but recently I’ve moved away from that approach: For low-level stuff, I tend to put the test code into a unit test. This is just as easy to debug as a command-line tool, but it has the advantage that, as you exercise various code paths, you build up a corpus of unit tests that ensure that things continue to work in the future. For GUI stuff, I lean into Xcode’s preview feature. Or just do my experimentation in an target. And there’s Xcode’s UI testing support. I don’t use that a lot but, in my defence, UI stuff isn’t my focus. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
Topic: UI Frameworks SubTopic: SwiftUI Tags:
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Reply to test NEAppProxyProvider without MDM?
[quote='882274022, Davidbaraff2, /thread/820572?answerId=882274022#882274022, /profile/Davidbaraff2'] Do you know of any off the shelf VPNs that can be configured in the way you describe? [/quote] No. But my expertise is in VPN APIs, not VPN products. [quote='882274022, Davidbaraff2, /thread/820572?answerId=882274022#882274022, /profile/Davidbaraff2'] If you could point me [at code to] open sockets that will only use cellular [/quote] To start you off: Extra-ordinary Networking > Network Interface Techniques > Binding to an Interface explains how to bind a socket to a specific interface. Extra-ordinary Networking > Network Interface APIs > Network Interface Type explains how to identify the WWAN interface. [quote='882274022, Davidbaraff2, /thread/820572?answerId=882274022#882274022, /profile/Davidbaraff2'] We have total control of our local network. [/quote] So what happens if you don’t deploy a DHCP server on that network? I would expect that you’ll still be able to communicate with your iPads us
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3d
Reply to Are there known issues with aggressive optimization (-O) affecting third-party libraries?
[quote='821109021, JTechHyd, /thread/821109, /profile/JTechHyd'] Are there known issues with aggressive optimization (-O) affecting … ? [/quote] Yes. If you’re using a C-based language it’s very easy to rely on undefined behavior, and the exact behaviour you get can change based on the optimisation level, the compiler version, the OS version, and so on. This is true in safer languages as well, but it’s less common. For example, Swift is generally safer than C but there are still sources of undefined behaviour, including unsafe pointers [1] and concurrency [2]. Is sounds like you’re building this third-party library from source. Is that right? If so, you can dig into the library to see if you can isolate the cause of the problem. This is no different from tackling a hard-to-debug problems in your own code. You can use both build-time tools (like the Clang static analyser) and runtime tools (like the standard memory debugging tools). It’s also possible for problems like this to be caused by bugs in the compiler
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3d
Reply to How to debug a Launch Daemon that requires an App Group provisioning profile for XPC communication
[quote='821027021, Pavel, /thread/821027, /profile/Pavel'] For debugging purposes, I am trying to run the daemon's executable directly from the terminal [/quote] This won’t work. For your launchd daemon to work correctly, it must be started by launchd. I explain why that’s the case in XPC and App-to-App Communication. My general advice for debugging a launchd daemon is: Structure your code so that you can do most of your debugging in unit tests, rather than in your daemon. That’ll make your life much easier. To unit test your XPC code, use the technique in TN3113 Testing and debugging XPC code with an anonymous listener. To debug integration issues: Using LLDB’s --wait-for option to attach to the daemon shortly after it starts. There’s a similar option in Xcode, under Debug > Attach to Process by PID or Name. Or if you absolutely need to debug from the first instruction, add the WaitForDebugger property to your launchd property list. See the launchd.plist man page for details. [quote='821027021, Pavel, /th
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